The Xtube adult entertainment porn website, a top 800-ranked website in the United States, appears to have recently suffered a malware infection. Hackers have injected malicious code directly into Xtube, and visitors are being redirected with rotating domains towards an exploit landing page.

"Contrary to a malvertising issue where the problem is external, XTube admins need to look at their own server to identify the issue," said Jerome Segura, senior security researcher at Malwarebytes, in a statement to SCMagazine.com. "Based on what we saw, this [is] a dynamic infection that injects [a] malicious iFrame 'on-demand.' In other words this is not hardcoded in the page's source code, but added on-the-fly."

Porn websites are popular targets for cybercriminals due to high amounts of Web traffic, with RedTube recently suffering an issue earlier in 2015. Towards the end of 2015, another popular adult website, xHamster, also suffered a successful malvertising campaign.